SPS whitening and polyps hide, PLEASE HELP!!

[nelcadiz]

Well I've been with it since I started dragging the summer with some SPS (Montiporas digitatas, Montiporas plate and acroporas) that I removed the polyps have stopped growing or whitening, however other sps as milkas, Pocilloporas, and other Montiporas seriatoporas digitatas are well and growing. At first I thought it might have been the heat and density, as in some summer days the aquarium has been at 29 degrees and a maximum density of 1021 to 1022, but about a month ago is already being corrected maximum temperature of 27 degrees and a density of 1024 (I take it to 1025 it was originally). I leave today data taken
Po4 0.00 (Hanna), 0.00 No3, 7.7-8.00 Ph, Kh 7, 455 Ca, Mg over 1500 (I consumes very little).
I do water changes with sea water every 15 days approx. of 10%, and UV sterilizing filtrádola with a sock 150 micron and activated carbon, corals alimentoa nightly with phyto Easy coral reef and vitalizer alternate days, the fish twice a day.

I do not understand what is happening, as most corals are fine and the settings are correct.

[nelcadiz]

I have some photos of some cuttings and pieces, with the prior with parameters (I have a journal where I document everything) and now photos

Tricolor Acropora, 31/07/2012 kh 16.8, CA 250, 1350 mg, 1022 density
http://i378.photobucket.com/albums/oo223/nelcadiz/DSC_5832.jpg

Acropora today 17/09/2012
http://i378.photobucket.com/albums/oo223/nelcadiz/DSC_5844.jpg

31/07/2012 Orange Montipora digitata kh 16.8, CA 250, 1350 mg, 1022 density
http://i378.photobucket.com/albums/oo223/nelcadiz/DSC_5821.jpg

today 17/09/2012
http://i378.photobucket.com/albums/oo223/nelcadiz/DSC_5841.jpg

Montipora digitata 03/05/2012 16.16 kh, ca 300 mg 1320
http://i378.photobucket.com/albums/oo223/nelcadiz/DSC_5580.jpg

today 17/09/2012
http://i378.photobucket.com/albums/oo223/nelcadiz/DSC_5842.jpg

So some more cuttings, without mebargo others are great and growing by the day as milkas other montis digitatas ...

[evh5150]

Calcium is low and Alk is way to high.

[westreef]

Calcium is low and Alk is way to high.

+1 Alk should be around 8 to 10 . And keep it real stable.

[BigAl2007]

I hate to say it but I think this one is already too far gone (algae growing on it's skeleton)
http://i378.photobucket.com/albums/oo223/nelcadiz/DSC_5842.jpg

You need to get your water params more in balance and more importantly stable. Those numbers seem to have some substantial variations. Also elevated temps can be very detrimental to many coral especially if they are more than just a short burst.

[nelcadiz]

Then, about what range of parameters I have to maintenaince?

[Jay uk]

Cal 420 Alk from 7 to 9 is good mag 1300.

Bring the Alk down slowly and cal up 5 or 10 every day.

[Editour2]

Calcium 380-450 ppm
Alkalinity 2.5-4 meq/L or 7-11 dKH
Salinity 35 ppt or sg = 1.026 34-36 ppt
Magnesium 1250-1350 ppm

[nelcadiz]

Okey thanks for it. The green montipora digitata is starting to show few polyps. Any more council??

[Mock]

Calcium 380-450 ppm
Alkalinity 2.5-4 meq/L or 7-11 dKH
Salinity 35 ppt or sg = 1.026 34-36 ppt
Magnesium 1250-1350 ppm


Just find a spot here and keep your numbers level.

Find out what your salt mix is coming out to with a fresh batch. If its coming out at 9dkh and 400 Cal.... Try to keep it at those numbers... find a middle ground and stay there. 9dkc and 420 cal is plenty. 1.025 or 1.026 and keep the mag high... 1300-1400....

High flow but not direct and research what corals like what lighting... Certain corals dont like to be beamed with high par all day, some do.